All you have to do is go to single player and then to an empire map. Choose a 3 on 1 match (You and 2 other teams vs. 1 team) and the game should be over soon. Then after the game is over you will get empire points!

this only works for 3 player mode in the mongol steppes map with starting age 4 and no blackmap or fog of war. In this map, the players start very close to each other. so close, in fact, that by simply moving your two-handed swordsmen toward another civilization, you can attack their villagers as they build their town center, and stop them from making it. Now,they can\'t build anything. Get your hero to the third civilization and attack their villagers on the second turn as well. Now neither enemy can build anything, and all they have is two-handed swordsmen and a hero, who should be able to fall after you build a small army. ( This is best done with the mongols. Also, the three civilizations start in an upside-down trinagle shape. make sure you are in the top-left. )